| 主权项 |
1. A method for producing unforgeable printable image from information data, comprising following steps:
encoding the information data in a form of binary information image dots by means of an encoding rule, wherein the binary information image dots are arranged screen-like according to a first screen in the respective first screen areas (R1) within an image area (R0); partitioning the respective first screen areas (R1) by a second screen to respective second screen areas (R2), so that a plurality of second screen areas (R2) is formed for each first screen area (R1); determining a respective information field (lxy) from the respective second screen areas (R2) of the respective first screen area (R1) according to a first assignment rule and determining the remaining second screen areas (R2) as interference fields (Sxy); assigning to the respective information field (lxy) depending on the value of the information image dot at a value of 1 a first information color value (IF1) and at a value 0 a second information color value (IF0) according to an information color value assignment rule; determining and assigning a respective interference color value to the respective interference fields (Sxy) according to an interference color value assignment rule; and storing the second screen areas with the respective information color values (IF1, IF0) and interference color values as the image information data; and printing the unforgeable printable image based on the image information data. |
